package com.atguigu.eduservice.Listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SujectExcelListener extends AnalysisEventListener<SubjectData> {

//    SujectExcelListener不能交给spring管理，需要自己new，不能注入其他对象
//      不能实现数据库操作

    public EduSubjectService subjectService;

    public SujectExcelListener() {
    }

    public SujectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

//    判断1级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }


//    判断2级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null) {
            throw new GuliException(20001,"文件数据为空");
        }

        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject==null){
//            表中没有相同的一级分类
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

//        取一级分类id值
        String pid=existOneSubject.getId();
        EduSubject existTwoSubject=this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if (existTwoSubject == null) {
//            表中没有相同的二级分类
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);

        }

    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
